<template>
  <div>
    <sy-collapse :selected.sync="selectedItem" single>
      <sy-collapse-item title="Hello 1" name="1">
        <div>Hello World~</div>
      </sy-collapse-item>
      <sy-collapse-item title="Hello 2" name="2">
        <div>Hello World~</div>
      </sy-collapse-item>
      <sy-collapse-item title="Hello 3" name="3">
        <div>Hello World~</div>
      </sy-collapse-item>
    </sy-collapse>
  </div>
</template>
